IF the recovery of the autosave files was okay, then they are in fact corrupt/bad archives. And your actual latest project file could be too. (I.e. bad luck on top of bad luck.) So did you have other backups? Did you have a backup of the drive (even if not your latest project version)? etc.

It is always good practice to save regular backups (save a copy) to a different drive, in addition to using autosave. If you did, even if outdated, great. If not, lesson for the future!

Did you have cloud sync turned on for this project? It would provide the latest version of your project file - it does not keep multiple versions.